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      Question

      In a rectangular floor of length and breadth of 12

      metres and 9 metres, respectively, square tiles each of 3 metre edge length are to be laid. If the cost of each tile is Rs. 144, then find the total cost of the tiles to be laid in the room.
      A Rs. 1720 Correct Answer Incorrect Answer
      B Rs. 1628 Correct Answer Incorrect Answer
      C Rs. 1728 Correct Answer Incorrect Answer
      D Rs. 1828 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Area of the rectangular room = 12 × 9 = 108 m2 Area of each tile = 3 × 3 = 9 m2 So, number of tiles to be laid in the room = (108/9) = 12 So, total cost of all the tiles laid in the room = 12 × 144 = Rs. 1728

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